Question

Помогите пожалуйста с пессив войс.
Who has packed the boxes?
A)who has been packed the boxes by?
B)who have been packed the boxes by?
C)by whom the boxes has been packed?
D)by whom has the boxes been packed?
E)who have the boxes been packed by?

Answer 1

who+have/has+object+v3+by / by whom+have/has+object+v3
who has
D